For 802.3bz MultiGig Ethernet, which supports speeds of 2.5 Gbps and 5 Gbps over twisted-pair cabling, the recommended cabling standards vary based on the distance:
Cat-5e: Suitable for 2.5 Gbps up to 100 meters; 5 Gbps up to 55 meters
Cat-6: Suitable for 5 Gbps up to 55 meters
Cat-6a: Suitable for 10 Gbps up to 100 meters
Given that some cable runs will exceed 55 meters, Cat-6a is the most appropriate choice to ensure reliable MultiGig performance over longer distances.
Reference: CWDP-305 Official Study and Reference Guide, Chapter on Infrastructure Design

Jitter and latency are two important metrics for measuring the quality and performance of wireless networks, especially for real-time applications such as voice and video. Latency is the average time taken for a data packet to reach the destination, while network jitter is the irregularity in latency. When the latency is consistently high, it can mean a slow but stable connection. On the other hand, a high jitter means there may be sporadic disruptions or delays in the transmission, which can affect the quality of service and user experience. Jitter is caused by various factors, such as network congestion, interference, routing changes, hardware issues, or packet prioritization. Jitter can be measured by calculating the difference between the latency of two consecutive packets, or by using the standard deviation of the latency of a sample of packets.
Jitter can be reduced by using Quality of Service (QoS) mechanisms, such as traffic shaping, queuing, or scheduling, which can prioritize the packets based on their importance and sensitivity to delay. Jitter can also be mitigated by using jitter buffers, which can store the incoming packets and smooth out the variations in latency before delivering them to the application. References: CWNP, CWDP Certified Wireless Design Professional Official Study Guide, Network Jitter - Common Causes and Best Solutions, Network Jitter vs Latency: What's the Difference and Why Does It Matter, Jitter vs Latency - What's The Difference and Why it Matters